[GHC] #669: negative indentation in Text.PrettyPrint.HughesPJ

[GHC]

#669: negative indentation in  Text.PrettyPrint.HughesPJ
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 Reporter:  waldmann at imn.htwk-leipzig.de  |          Owner:         
     Type:  bug                           |         Status:  new    
 Priority:  normal                        |      Milestone:  6.8    
Component:  hslibs/text                   |        Version:  6.4.1  
 Severity:  minor                         |     Resolution:         
 Keywords:                                |     Difficulty:  Unknown
 Testcase:  pp1                           |   Architecture:  Unknown
       Os:  Unknown                       |  
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Comment (by simonpj):

 That's interesting!

 So a valid way forward would be
   * First, to document this point in the Haddock docs for 'nest', perhaps
 giving the examples that John does.
   * Second, to arrange that in the erroneous situation that a user asks
 for negative indentation, the library uses zero rather than looping.  And
 to document this point.

 Simon

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Ticket URL: <http://hackage.haskell.org/trac/ghc/ticket/669>
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